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We recommend that you do not collect or post samples between Tuesday 31st and Sunday 5th June.

Vitamin K (Nutritional) Blood Test

Vitamin K (Nutritional) Blood Test


A blood test to measure the levels of vitamin K, which is important in blood clotting as well as regulating blood calcium levels and bone metabolism.
Blood sample 1 biomarker included Results estimated in 9 working days from sample receipt at lab
Vitamin K (Nutritional) Blood Test
Vitamin K (Nutritional) Blood Test
Vitamin K (Nutritional) Blood Test
Vitamin K (Nutritional) Blood Test

What's included?

Biomarker profile

  • Vitamins

Vitamins (1 Biomarker)

Special instructions

Do not eat for 12 hours prior to your test. Drink plenty of water, if you take medication then you are allowed to take it as you would normally. Wrap your sample in foil immediately after it is taken.

From the expert

Vitamin K refers to a group of fat-soluble vitamins that play a role in blood clotting as well as regulating blood calcium levels and bone metabolism. In the liver, vitamin K is required to produce 4 factors that are necessary for blood to properly clot: prothrombin and factors VII, IX, and X.

Most people get all the vitamin K they need by eating a varied and balanced diet. Because vitamin K is a fat-soluble vitamin, any vitamin K in the body that is not needed immediately is stored in the liver for future use. Green leafy vegetables including broccoli and spinach, vegetable oils and fortified cereals are all good sources of vitamin K. 

In the UK for those who eat a healthy, balanced diet a vitamin K deficiency is rare. However, those at risk of developing a vitamin K deficiency include those with conditions that limit absorption of dietary vitamins such as biliary obstruction, coeliac disease, ulcerative colitis and cystic fibrosis. Vitamin K supplements are also available but monitoring the dose is important as too much can be harmful, so it is advised you speak with your doctor before supplementing vitamin K.

This test measures the level of vitamin K in your blood.

Dr Sam Rodgers MBBS, MRCGP
Chief Medical Officer


Laboratories you can trust

Trusted by the NHS and private clinics alike, you can be sure of the highest testing standards from our UKAS accredited partner laboratories.

Dr Sam Rodgers - Chief Medical Officer

Expert advice with your results

Get trusted advice and comments from one of our doctors based on your results.

Your personal health centre

Your personal health centre

Discover the easy way to track your health through our online portal, View your results with doctor's advice, monitor any changes over time and see the improvements you can make to your health with simple lifestyle changes.

Questions? Let us help
Questions? Let us help

Questions? Let us help

Our customer care team is on-hand to help you find the test that's right for you. Get in touch via phone, live chat or email.


Our tests are not a substitute for seeing your doctor, especially if you are suffering symptoms. Our doctors will interpret your results based on the information you have provided, but will not diagnose, consult or provide any treatment. You will be advised to see your doctor for any necessary follow-up action.